After 25 Years, Linux Is the World’s Dominant Operating System

On August 25, 1991, a Finnish computer science student named Linus Torvalds announced a new project. “I’m doing a (free) operating system,” he wrote on an Internet messaging system, insisting this would just be a hobby. But it became something bigger. Much bigger. Today, that open source operating system—Linux—is one of the most important pieces of computer software in the world. Chances are, you use it every day. Linux runs every Android phone and tablet on Earth. And even if you’re on an iPhone or…